Dekoni pads go on with a firm and reassuring click. The original sennheiser pads are a pain in the ... to put on and stay on. To make the original pads stay on, the entire pad needs firm and equal pressure to go on. Basically, try and put the entire pad on at once instead of bit by bit. Trying to do it bit by bit, in my experience, it will annoy you as one part or another will pop off. I also prefer dekoni elite sheep pads now. They are easier to go on and stay on and are so much comfier than the originals. They also help with the clamping force, making the 800S less likely to move once on.